The Top HVAC Choice in Frankfort, IL

Here at Allegiance Heating & Cooling, we’re proud to be the top "HVAC" Company in Frankfort, IL. Our family-owned and operated heating and cooling business has served Will County for over a decade. Our professional team of licensed HVAC technicians are friendly, knowledgeable and ready to assist you.

We can help you no matter where you’re located in Frankfort and the surrounding communities. From Main Park to Commissioners Park, you’ll notice our vans driving through town on the way to help another homeowner.

Experience the Allegiance Difference!
We’d love to add you to our family of loyal customers!